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C++ Client Libraries | Google Cloud

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Dialogflow ES API C++ Client Library

An idiomatic C++ client library for the Dialogflow ES API, a service to build conversational interfaces (for example, chatbots, and voice-powered apps and devices). There are two editions of Dialogflow, this library supports the ES edition.

While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.

Quickstart

The following shows the code that you'll run in the google/cloud/dialogflow_es/quickstart/ directory, which should give you a taste of the Dialogflow API C++ client library API.

#include "google/cloud/dialogflow_es/agents_client.h"
#include "google/cloud/project.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  if (argc != 2) {
    std::cerr << "Usage: " << argv[0] << " project-id\n";
    return 1;
  }

  namespace dialogflow_es = ::google::cloud::dialogflow_es;
  auto client =
      dialogflow_es::AgentsClient(dialogflow_es::MakeAgentsConnection());

  auto const project = google::cloud::Project(argv[1]);
  for (auto a : client.SearchAgents(project.FullName())) {
    if (!a) throw std::move(a).status();
    std::cout << a->DebugString() << "\n";
  }

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}

Main classes

This library offers multiple *Client classes, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.

The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the *Client classes when testing your application.

More Information

Error Handling - describes how the library reports errors.
How to Override the Default Endpoint - describes how to override the default endpoint.
How to Override the Authentication Credentials - describes how to change the authentication credentials used by the library.
Override Retry, Backoff, and Idempotency Policies - describes how to change the default retry policies.
Environment Variables - describes environment variables that can configure the behavior of the library.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This webpage details the Dialogflow ES API C++ client library, which is used to build conversational interfaces and supports the ES edition of Dialogflow."],["The library offers multiple `*Client` classes, like `AgentsClient` and `SessionsClient`, each exposing RPCs for their respective service, and this library does not use semantic versioning."],["The latest available version of the Dialogflow ES API C++ client library is `2.37.0-rc`, and a list of all the available versions are listed, going as low as 2.11.0."],["The provided quickstart code example demonstrates how to use the `AgentsClient` to search for agents within a project, giving a practical overview of the library's functionality."],["The page provides links for error handling, overriding the default endpoint and authentication, along with a description of the environment variables that can configure library behavior."]]],[]]

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